For more information about the sequence in which vSphere environments need to be updated, refer KB 2057795.

Post upgrade to vCenter Server 5.5 U3e, manually set SSLv3 states of certain components might not be retained.

SSLv3 states on these services needs to be manually re-configured if needed.

VMware does not recommend re-enabling SSLv3 due to POODLE vulnerability. If at all you need to enable SSLv3, you need to enable the SSLv3 protocol for all components. For more information, refer KB 2139396.